Method of distilling shale and similar bituminous fuels



May 26, 1925.

. H. ROSENTHAL METHOD OF ms'nnune SHALE AND "SIMILAR BITUMINOUS FUELS Original Filed March 24, 1922 Patentei'lMay 1925. 1 i

UNITED TATES PATENT ()FFICE..

.nims-nosnnr mnorfnnnmn, GERMANY, assmnon T JULIUS rmrson AKTIEN qnsnnnscnnrr, OF-BERLIN, GERMANY. I

mn'rnon or DISTILLING snann AND SIMILAR nrrumnous norms.

.Origin'ai application filed March 24, 1922, Serial No. 546,430 Divided and this application filed To all whom it may concern: j H

- Be it known that I, HANS ROSENTHAL, a

' German citizen, residing at Berlin, in the Province of Brandenburg, Germany, have t invented certain new and useful Improvements in 'or-Relating to a Method. of Distilling Shale and Similar Bituminous Fuels,

"of which the following is a specification. ,The present invention relates to a method or, distilling oil shale and similar bituminous fuels, and forms atdivision of the application Serial No. 54:6,430I0f 24 3, 1922. According to the latter the fixed carbon still contained in the distilled shale is gasified, and the hot gas obtained mixed with cold gas and introduced directly into the distilling zone in order, discharge of the sensible heat 'to distil the shale. 'According to the present invention the glowing and 9 already distilled shale is gasified as in the case-of the application Serial No. 546,430, but the gas obtained is drawn ofi' from the ,2 gasifying chamber, burnt in a s ial gas Flare-heater. of the circulation type i i cuperatorior regenerator), and the resulting heat given off on to gas or steam, which is thus heated to the temperature required for the distillation-oi the shale, and introduced into the distilling zone; The heated gas here distils the shale by 1 discharge of its, sensible (heat, is then freed of the volatile distillw tion products, the excess -amount being drawn oil, and the remainder a "a nheated as circulatory gas in the circu atlon preheater,,to be then introduced anew intothe,

distilling/zone. This circulatory gas is a pure, high-grade distillation gas not contaminated by atmospheric nitrogen.

' to ed gasifying gas-to the pre-heater under,

sufficient pressure," or to conduct same to another point of employment, 1t isin certa'm cases desirable to providea cooling de- 4 rear of the gas exit. The heat thus released may be utilized for pro-heating the com- 7 bustion air, for generation of steam, or for otherpurposes. The distillation of the shale and the subsequent combustion may,=if desired, also be eiiected in two apparatus spaced at a distance apart. If the fixed car- I bon is not of such quantity as to sufficiently beat the circulation gas in the pre-heater,

- February 4, 1925. serial/m; 6,850.

-' a part of the generated distillation gas or an entirely different fuel may be burnt in addition in the pro-heater.

A form of embodiment of the invention is shown diagrammatically in the accompanying drawing.

1 indicates thedistilling zone ofthe plant, 'whilst 2'is a neutral zone and-3 the gasifying zone with the rotary hearth 4. Cold or pre-heated air or steam, or a mixture of both, oralso a mixturecontammg carbonic acid gases, is conductedthrough the pipe 5 into the glowing and already distilled shale. In this zone 3 the gasifying occurs of the fixed carbon still contained in the distilled shale The gas thus obtained is drawn ofi by means of the ventilator 6 through the pipe 7; In front of the ventilator 6 is situated a cooling device 8, in order, as described above, to be able to employ the heat thus released for preheating the combustion. air, for generation of steam, or forother' purposes. A portion of the gas sucked up through the ventilator 6 passes through the branch pipe 9 into the pre-heater 10, in

which the gas is burnt, the burnt gas escaping through the pipe 11 into the open. The heat released by the combustion is given ofl "on to the gas traversing the pro-heater in the pipe12. This gas is termed circulatory gas, and acts. as a heat transmission means for theydistilling process The distillation gas is drawn by means of the ventilator 14:

out of the pipings or sockets 13 into the 'plpe 17, the cooling device 15 and the tar separator 16 being located at an intermediate point, and from there is passed through the p pipe 18 to the desired point of consumption l. i .In ordemto be able to supply the generat- A partof this distillation gasreachesthe pipe 12 andyas described above, is heated in the ore-heater to the ten'lperature'required by means-of the fillin device 19.

' vice,'scrubber or the like directly to the v The gas drawn 0 from the. combustion zone, which is, not required to be burnt in the pre-heatem'passes through the pipe -7 "to a desired point of consumption. Throttle heating, consisting in Wholly or partly burn- In testimon whereof I have afiixed my ing in a speciafli pre-heatfer l'ihe iga? resultiing signature in the presence of two Witnesses. from the gasi cation'o te sm e resi ue, said gas giving off in the pre-heater the heat HANS ROSENTHAL- 5 resulting from its crsnbustion on to a gas, \Vitnesses:

which continuously circulates through the 'WLAD EN ER, fuel. and acts as a heat transmission means. Ror- V. Fox. 

